v.T-T Jumper: Select models have pre- installed T-T jumper resistor. To remove, use side-cutting pliers to cut jumper (See Figure 28).

vi.Diagnostic LED: The indicator light on oil primary control provides lockout, recycle and cad cell indications as follows:

•Flashing at 1 Hz (½ second on, ½ second off): system is locked out or in Restricted Mode.

•Flashing at ¼ Hz (2 seconds on, 2 seconds off): control is in Recycle Mode.

•On: cad cell is sensing flame.

•Off: cad cell is not sensing flame.

vii.Cad Cell Resistance Check: For proper operation it is important that the cad cell resistance is below 1600 ohms. During a normal call for heat, once the control has entered the Run Mode, press and release the reset button. Indicator light will flash 1 to 4 flashes. See Table 5 for equivalent cad cell resistance.

TABLE 5: CAD CELL RESISTANCE WHEN SENSING FLAME

Flashes

Cad Cell Resistance in ohms

1

Less than 400

2More than 400 and less than 800

3More than 800 and less than 1600

4More than 1600 and less than 5000

b. CHECK OIL PRIMARY CONTROL

CAUTION

Due to the potential hazard of line voltage, only a trained, experienced service technician should perform the following safety checks.

This control contains no field-serviceable parts. Do not attempt to take it apart. Replace entire control if operation is not as described.

i.Preliminary Steps

•Check wiring connections and power supply.

•Make sure power is on to the controls.

•Make sure limit control is closed.

•Check contacts between ignitor and the electrodes.

•Check the oil pump pressure.

•Check the piping to the oil tank.

•Check the oil nozzle, oil supply and oil filter.

ii.Check Safety Features Safe Start:

•Place a jumper across cad cell terminals.

•Follow procedure to turn on burner. Burner must not start, indicator light turns on and control remains in Idle Mode.

•Remove jumper.

iii.Simulate Ignition or Flame Failure:

•Follow procedure to turn on burner.

•Close hand valve in oil supply line.

•Failure occurs, device enters Recycle Mode. Indicator light flashes at ¼ Hz rate 2 seconds on, 2 seconds off).

•Device tries to restart system after approximately 60 seconds.

•After third Recycle Mode trial, safety switch locks out within safety switch timing indicated on label and control enters Restricted Mode. Indicator light flashes at 1 Hz rate (½ second on, ½ second off). Ignition and motor stop and oil valves closes.

•To reset from Restricted Mode: Press and hold the reset button for 30 seconds. When the LED flashes twice, the device has reset.

iv.Cad Cell Check: See Figure 29.

Figure 29: Cad Cell Location

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Burnham V8 Series manual CAD Cell Resistance When Sensing Flame
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V8 Series specifications

The Burnham V8 Series is a prestigious line of oil-fired boilers renowned for their efficiency, reliability, and advanced design features. Tailored for residential and light commercial applications, this series exemplifies the perfect blend of tradition and modern technology, ensuring long-term performance and comfort for users.

One of the hallmark features of the Burnham V8 Series is its exceptional cast iron construction, which provides durability and superior heat retention. This robust design allows for an extended lifespan while ensuring that the boiler can withstand the rigors of daily use. The cast iron sections are engineered to facilitate optimal heat transfer and efficiency.

The V8 Series boasts an impressive fuel efficiency rating, often exceeding 85%. This high efficiency is achieved through a combination of advanced combustion technology and the boiler's thoughtful design, which minimizes heat loss. Users benefit not only from lower energy bills but also from a reduced environmental footprint, making the Burnham V8 Series a sustainable choice for heating solutions.

In terms of technology, the Burnham V8 Series features a standing pilot ignition system or an optional intermittent ignition device that enhances safety and efficiency. The advanced burner design allows for smooth operation and excellent fuel utilization, further contributing to the overall economy of the system.

Another notable characteristic is the versatility of the Burnham V8 Series. It can be easily adapted to work with various heating systems, including hot water heating applications. Its compatibility with different fuels, such as natural gas or oil, gives users the flexibility to choose the best energy source for their needs, providing longevity and value.

The installation process is made straightforward with ample connectivity options for plumbing and flue. Its compact design enables easier placement within homes or commercial spaces without compromising performance. Furthermore, the boiler is backed by extensive warranties, ensuring peace of mind for homeowners and businesses alike.

In conclusion, the Burnham V8 Series stands out as a reliable and efficient heating solution, blending robust construction with advanced technology. Its commitment to performance, versatility, and efficiency makes it an excellent choice for meeting the heating demands of various applications while promoting environmental responsibility. Whether for a single-family home or a light commercial building, the Burnham V8 Series remains a trusted leader in the industry.
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